Which term denotes the skin condition with widespread redness?

• A. Erythema
• B. Dermatitis
• C. Erythroderma
• D. Cyanoderma

Answer: (C)

Widespread redness of the skin is described by the term erythroderma. This word comes from erythro-, meaning red, and -derma, meaning skin, and it specifically refers to redness that covers most or all of the body surface. Erythema, while also meaning redness, is usually just a localized blush from increased blood flow. Dermatitis is inflammation of the skin and can involve redness, swelling, and itching but isn’t defined by the extent of skin involvement. Cyanoderma isn’t a standard term for red skin and would suggest a different coloration. So when the redness is generalized across much of the skin, erythroderma is the correct description.